You don't have to revert back to get the Denim update but you do have to tick off the PFD app and check for updates. Once the update is received you can tick the PFD app back on. Based on others I have read here, this seems to work the best.

But denim has improved drivers for every Device which will help your phone work better. Nearly most of the denim users reported that their battery şife increased

Indeed there are probably some "bug" fixes but he was meaning that you won't get new features. But do not expect to get a double battery live time. And anyhow you will get denim and the only thing you can do is wait till it is realized for your phone.

Indeed there are probably some "bug" fixes but he was meaning that you won't get new features. But do not expect to get a double battery live time. And anyhow you will get denim and the only thing you can do is wait till it is realized for your phone.

Well m8 when i was with lumia Black and 8.1 my battery lasted only 12-14 hours. And my phone is 1320 which has 3400mah battery that originally lasted 2-3 days. But when cyan was released, my battery life increased A LOT. i think sane thing will go on with denim